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7 CHECK POWER TRANSISTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 1 and power transistor terminal 1. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK 䊳 GO TO 8.
NG 䊳 Repair open circuit or short to ground or short to power in harness or connectors.
8 CHECK IGNITION COIL
1. Disconnect ignition coil harness connector.
2. Check resistance as shown in the figure.
SEF013S
AEC657A
MTBL0248
For checking secondary coil, remove distributor cap and measure resistance between coil tower metal tip 9 and termi-
nal 7.
OK or NG
OK 䊳 GO TO 9.
NG 䊳 Replace distributor assembly.
IGNITION SIGNAL
VG33E
Diagnostic Procedure (Cont’d)
EC-1166
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